大约有 7,000 项符合查询结果（耗时：0.0360秒） [XML]
How to break out from a ruby block?
...example would be doing something like this:
class Bar
def do_things
Foo.some_method(x) do |i|
# only valid `targets` here, yay.
end
end
end
class Foo
def self.failed
@failed ||= []
end
def self.some_method(targets, &block)
targets.reject {|t| t.do_something.bad...
Understanding Node.js modules: multiple requires return the same object?
...tance of A. From the node.js documentation:
... every call to require('foo') will get exactly the same object returned, if it would resolve to the same file.
The situation is different when a.js, b.js and app.js are in different npm modules. For example:
[APP] --> [A], [B]
[B] --> ...
How to check for valid email address? [duplicate]
...l begrudgingly forgive people that don't allow email addresses like 100%." foo b@r"(this is a cool email address!)@(just a tld)com(ok), but I think the check for an @ symbol is really all you should have (a top level domain is valid as the domain part, but it's improbable).
– C...
Define preprocessor macro through CMake?
...t, you can do the following:
target_compile_definitions(my_target PRIVATE FOO=1 BAR=1)
You should do this if you have more than one target that you're building and you don't want them all to use the same flags. Also see the official documentation on target_compile_definitions.
...
Creating the Singleton design pattern in PHP5
...n instance of its parent class instead of its own.
Now you can do:
class Foobar extends Singleton {};
$foo = Foobar::getInstance();
And $foo will be an instance of Foobar instead of an instance of Singleton.
share
...
Get string character by index - Java
... can use to give me the character at the nth position? So in the string "foo", if I asked for the character with index 0 it would return "f".
...
How to prettyprint a JSON file?
...ent by:
>>> import json
>>>
>>> your_json = '["foo", {"bar":["baz", null, 1.0, 2]}]'
>>> parsed = json.loads(your_json)
>>> print(json.dumps(parsed, indent=4, sort_keys=True))
[
"foo",
{
"bar": [
"baz",
null,
...
How do you 'redo' changes after 'undo' with Emacs?
... Suppose you do have an operation sequence that looks like this:
Insert "foo"
Insert "bar"
Insert "I love spam"
Now, you undo. It undoes the last action, resulting in the following list:
Insert "foo"
Insert "bar"
If you do something other than undo at this point - say, C-f, the operation st...
Function overloading in Javascript - Best practices
...last argument to their methods. This object can hold anything.
function foo(a, b, opts) {
// ...
if (opts['test']) { } //if test param exists, do something..
}
foo(1, 2, {"method":"add"});
foo(3, 4, {"test":"equals", "bar":"tree"});
Then you can handle it anyway you want in your method. ...
How to specify test directory for mocha?
...ource that they test, but call the test files *.spec.js. For example: src/foo/foo.js is tested by src/foo/foo.spec.js.
To run all the tests named *.spec.js by convention:
"scripts": {
"test": "mocha **/*.spec.js"
},
Then to run all the tests call:
npm test
See the pattern here? Good...